Photo of the week: Greater Sage-Grouse

Robert Martinez of Denver shot this photo of a strutting male Greater Sage-Grouse on a sub-zero morning in March 2013 at a lek near Walden, Colorado. The area around Walden, in north-central Colorado, is home to several sage-grouse leks, or breeding areas. Martinez photographed the bird from his car with a Canon EOS 7D and a 100-400mm lens.

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